| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 490659 |
|
| 2 | [prep] a [noun] | 490653 |
|
| 3 | after [art] [noun] | 17881 |
|
| 4 | after a [noun] | 6135 |
|
